joy benedict talked to the neighbor who found it. >> seen where he crashed the car and i stopped and then i saw the gun laying in the snow. >> reporter: a startling discovery for the angeles oaks man. he found a walther gun lightning by the road a gun investigators believe was part of christopher dorner's arsenal. >> forensic will respond and photograph it and collect the evidence. >> reporter: he called the san bernardino county sheriff which arrived to take the weapon. this is where dorner crashed the first stolen car tuesday. ramirez was here moments after the crash and was stopped by police. >> as we pulled up, they stopped us and they thought he was in our vehicle because this is just happening. >> reporter: and that's why he came back to see where the 10- day ordeal ended, an ordeal that claimed five lives including dorner's and shook this community. >> my son was sleeping in the hallway and my daughter with the doors open. >> reporter: a mile from the cabin where dorner made his last stand. caution tape and evidence markers only beginning to tell the story. this lower level ro